Repository of information describing the data in database

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Reference no: EM131096002

Which of the following descriptions is incorrect?

(A)Data dictionary is a repository of information describing the data in the database

(B)A constraint is a rule that is enforced on the data

(C)Data manipulation language is a set of commands used to alter the data in a database

(D)Data flow diagram signifies the quantities involved in an association

Reference no: EM131096002

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